Ribbed metal ring binder



FIG. 1 is an isometric view of a ribbed metal ring binder, showing my new design from above and to one side;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a right side view thereof, the left side view being identical; and,

FIG. 5 is an end view thereof, both ends being identical. 

The ornamental design for a ribbed metal ring binder, as shown and described. 